DE1808056A1 - Plug connection for pipes with outside helical ribs, deserts or the like. - Google Patents

Description

DYNAMIT NOBEL AKTIENGESELLSCHAFT Troisdorf, District Cologne

Plug connection for pipes with outside helical ribs, beads or the like. ^f;

The invention relates to a plug connection for pipes With one or more helical ribs, sleeves or the like formed on their outer side, with at least one between the inserted pipe end and the overlapping pipe end BEZW. an overarching sleeve arranged annular sealing element.

The connections known for pipes that are smooth on the outside, at which one or more annular sealing elements either inserted in a corresponding number of grooves Tubing or the overlapping pipe end or an overlapping one Socket are arranged, can in pipes with outside helically extending ribs, beads or the like, as they exist in particular in so-called spiral tubes are, i.e. for pipes that are wound from a profile strip are, the edges of which interlocking, welding, gluing or the like. are trained without special and complicated measures do not apply. Such a special measure would be processing, for example the outside ribs of the pipe end to be inserted as well as the creation of a groove to accommodate the sealing -... element at the pipe end to be inserted or on the overlapping part of the other pipe.

To avoid such and other complicated measures, the invention proposes a plug connection that thereby is characterized in that the sealing element has a preferably right-angled, in its size corresponding to the slope

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has the stepped paragraph and by means of this through a number of ribs corresponding to the number of threads is passed through. With two or more threads on the outside can the stepped shoulder as well as with catchy ribbing be formed at a single point on the circumference of the sealing element, but it can also deviate from this formed at several, but at most a number corresponding to the number of threads, distributed over the circumference be.

Apart from the creation of relatively small rib openings, the width of which corresponds approximately to that of the sealing element, no further action is required. In particular, there is no need for complex milling work to achieve this a smooth spigot end by machining the ribs in this pipe area. It is also advantageous that the strength of the pipe end, which is largely due to its presence the circumferential rib is based, is practically completely preserved and that the space between adjacent Ribs offer themselves as a groove for inserting the sealing element or represent such a groove, ie none additional measures are required to create such a groove are.

Although the guided through the ribs step-shaped shoulder has necessarily a determination of the sealing element against displacement in the circumferential direction result, the invention provides, in particular in the case of the use of very soft and resilient sealing elements, in that ribs extending in ih'rer longitudinal extent of grooves to provided, in which the sealing element engages, so that © ine additional.Arr@- is given not only in the circumferential direction but also in any other direction *.

Occurred instead of or in connection with it. between the sealing element ur and the next turn of the rib ' to arrange a support profile bridging the gap, in which case it may not be the sealing element but rather the support profile engages in the groove of the rib. In addition, the support profile can also be attached to the pipe in some other way attached, for example glued.

Of course, it is also possible to have ribs of the same or different cross-section in such a way that they are two-fold To arrange a distance that the sealing element on both sides «contact and is thus clearly defined in the direction of the pipe axis.

Particularly when using sealing elements made of soft or resilient material, it is advisable to provide support the stepped paragraph against pressure load, the support profile with laterally protruding lugs or the like. to provide, which engage in the rib openings and are not only set in the circumferential direction themselves, but also the Stepped heels provide support or stiffen it.

There are many cross-sectional shapes for the sealing element conceivable. Proves to be particularly expedient and advantageous especially a cross-sectional shape with a grooved inner surface, so that in relation to the direction of the pipe axis several consecutive chambers are formed, which on the one hand ensure a good sealing effect, on the other hand prevent so-called "rolling" of the seal. This can be provided according to a further proposal of the invention be to choose the cross-sectional shape so that the outer surface - viewed in cross section - is semicircular and the cross section itself corresponds approximately to an isosceles or an equilateral triangle.,

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1808066

On the one hand, this ensures an advantageous behavior with regard to radial compression or stress and on the other hand, a secure arrangement with regard to ter- ··· push and twist the sealing element. To increase the elasticity, the Form sealing element with a hollow cross-section.

Another possibility, 'the sealing element in the area of the To stiffen step-shaped shoulder against pressure load, there is also that the sealing element in this area Is educated more broadly. In addition or instead of this, provision can be made for stiffening the sealing element To provide inserts and / or stiffening in the circumferential direction, if necessary » to provide support body attached to the pipe.

The invention is shown in the drawing in exemplary embodiments and will be explained below with reference to these. Show it

Pig. 1 partially in section a plug connection between single-thread ribbed pipes,

2 shows a double-threaded pipe with a sealing element,

Pig. 3 a three-thread ribbed pipe with sealing element,

Pig. 4 in a cutout and in section a two-flight ribbed pipe with sealing element,

Pig »5 in the same way a pipe with in a groove of the Rib engaging sealing element,

Fig. 6 a means of support profile between adjacent Ribbed sealing element,

Pig. 7 the fastening of the support profile in a groove ■ the ribs,

8 shows a view of a ribbed tube with a sealing element and support profile,

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Pig .. 9 to 11 Pig. 12th Pig. 15th Pig. H

• - 5 -

three different cross-sectional shapes for the sealing element,

one in the area of the stepped heel widened sealing profile in a cutout,

in addition a section along the line A-B,

the .step-shaped paragraph of a Sealing profile and

Pig. 15 another type of attachment or

Support of the sealing element.

According to Pigur 1, the end of the pipe 1, which on its outside with the coarse helical ribs 2, is inserted into the conical guide 5 widened to the socket 4 of the similarly formed pipe 5. The annular sealing element 6 inserted between pipe 1 and sleeve 4 has the approximately right-angled step-shaped shoulder 7, by means of which it extends through the opening 8 of one rib so that it rests against one of the ribs over the entire pipe circumference. As indicated, the outer diameter of the sealing element 6 is larger than the inner diameter of the sleeve 4 _f so that the intended sealing effect is given by more or less strong compression of the sealing element with simultaneous elastic deformation. By means of the paragraph 7, the sealing element is fixed in the circumferential direction and thus prevented from unintentional migration.

In the tube of FIG. 2, the ribs 2 are double-threaded. Correspondingly, the stepped shoulder 7 of the sealing element 6 is guided through two ribs 2, wherein it is divided into two points distributed over the circumference of the pipe, the adjacent turns of the Ribs 2 aleo in different places with the Durohbreohungen

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are provided.

The tube 1 of FIG. 3 has the ribs 2, which have a somewhat different cross-sectional shape and which are designed here with three threads are. The sealing element 6 extends by means of his step-shaped paragraph 7 at one and the same point on the pipe circumference through three adjacent ribs 2. As shown in FIG. 2, the step-shaped Paragraph 7 can of course also be distributed over 2 or 3 places distributed over the circumference.

According to Figure 4 ist.die wall of the pipe 1 with the reinforcing ribs 2 and in one of the width of the ■ sealing element 6 Corresponding spacing therefrom extending support ribs 9 ribbed in two threads. In the one formed between the ribs 2 and 9 Chamber 21, the sealing element 6 is inserted, .daS thus is held inadvertently in the direction of the tube axis, not shown.

In the embodiment according to FIG. 5, the support rib 9 is dispensed with and instead the rib 2 is provided with the groove 10 into which the correspondingly designed sealing element 6 engages with the nose 11 unc "thereby held or in his Location is fixed.

According to FIG. 6, there is a sealing element inserted between the ribs 2 6 set in the direction of the pipe axis by the support profile 12.

FIG. 7 shows a variant in which the ribs 2, which have a different cross-section, are provided with the lateral groove 10 in the same way as in FIG. 5, into which the support profile 12 engages appropriately. Both here and in the example of FIG. 6, the support profile 12 is of course dimensioned in such a way that , taking into account the radial pairing

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of the sealing element 6 the axial fixing in the desired ' Way.

According to Figure 8, the side upstand between the Sealing element 6 and the rib 2 inserted support profile 12 continued at one end by the longitudinal extension and and formed laterally protruding in the form of the nose 13. By means of the rabbit 13, the support profile 12 engages in the rib opening 8 a, which on the one hand a locking of the support profile in the circumferential direction and at the same time a Support of paragraph 7 against internal pressure is achieved.

Figures 9 to 11 show a substantially triangular Cross-section formed sealing elements 6. While the profile of Figure 9 provided with the cavity H with two Bead 15 rests on the outer surface of the tube, not shown, are in the profiles of Figures 10 and 11 each four such beads are provided. In contrast to the full cross section in FIG. 10, in FIG. 11 there is again the cavity 14 provided. These profiles have the main advantage of a relatively wide contact surface on the pipe, which reliably prevents unwanted rolling or slipping. On the other hand, the external rounded tip 16 of the triangular section has the consequence that the sealing element has a has very good elasticity and, in particular, with its outer tip on the inner surface of the overlapping can adapt feiles very precisely. Of course, many other transverse, cuts conceivable.

According to FIGS. 12 and 13, the shoulder 7 of the sealing element 6 is in its lower part that comes to rest on the pipe Part widened by means of the flanges 17, so that a stiffening of the paragraph 7 in the circumferential direction and thus against

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possible internal pressure results. The cross-sectional shape of the sealing element is of course arbitrary here too, in particular in connection with the splashes 17 also realize the porms shown in Piguren 9 to 11.

Instead of the widenings 17, the sealing element 6 ^! the Pigur H the step-shaped shoulder 7 by means of the reinforcement 22 embedded in it, for example made of steel. >.

Another way of bracing and supporting the stepped Paragraph 7 of the sealing element 6 shows the Pigur 15, at who locked this in the rib opening S by means of the nose 19 Element 20 fits between two adjacent ribs is inserted. The thickness of the element 20 can correspond to the height of the ribs or less. As if by the dash-dotted line indicated, a web corresponding to the height of the ribs 2 can be formed as an extension of the nose 19, the remaining part of the element then being able to have a smaller thickness.

Troiedorf, October 30, 1968 /
Kg / hu. OZ 68159

009830/0860

Claims (12)

Claims • 1. Push-in connection for pipes with a .- on their outside. or multi-thread ribs, beads or the like, with at least one annular sealing element arranged between the inserted pipe end and the overlapping pipe end or an overlapping sleeve, thereby geke η η ζ eic h- " ^! * Net that the sealing element 6 has a preferably right-angled, step-shaped shoulder 7, the size of which corresponds to the slope, and by means of this is passed through a number of ribs 2 corresponding to the number of threads. 2. Plug connection according to claim 1, characterized in that that the ribs 2 with grooves 10 running in their longitudinal extension for the fixed insertion of the sealing element are provided. 3. Plug connection naoh claim 1 or 2, characterized in that that for fixing the sealing element 6 between this and the ribs 2 in the direction of the ribs extending support profile 12 is inserted. 4. Plug connection according to claim 3, characterized in that that the support profile 12 is attached to the outer surface of the pipe, '- for example inserted into hats 10 of the ribs 2 or is glued to the pipe 1. 5. Plug connection according to claim 3 or 41 thereby marked- ' shows that the support profile 12 has one or more eeit-r has borrowed protrusions 13 and with this or these is locked in the area of the Ripperidurchbrüohe. -2 - 009830 / OSÄO 1808OS6 6. Plug connection according to one of claims 1 to 5, characterized characterized in that the inner surface of the sealing element 6 with at least 2, preferably 4 Beads 15 is provided. 7. Plug connection according to one of claims 1 to 6, characterized characterized in that the · outer surface 6 - im Cross-section viewed - semicircular 'is. S. Plug connection according to one of claims 1 to 7, characterized in that the sealing element 6 -. in cross section considerable- the shape of an isosceles or essentially isosceles with its tip 16 pointing outwards equilateral triangles. 9 · Plug connection according to one of Claims 1 to 8, characterized in that the sealing element 6 is hollow Has cross section. 10. Plug connection according to one of claims 1 to 9, characterized characterized in that the sealing element is widened in the region of the step-shaped shoulder 7. 11. Plug connection according to one of claims 1 to 10, characterized in that the sealing element in the region of the step-shaped shoulder 7 with inserted support bodies 22 is provided. 12. Plug connection according to one of claims 1 to 11, characterized characterized in that the sealing element (6) is inserted in the region of the stepped shoulder (7) and support bodies (19; 20) is supported in the circumferential direction of the pipe. Troisdorf, October 30, 1968 Kg / hu. OZ 68159 _{ββββ30 / 0ββ0}